Koumei & the Five Fates Official Gameplay Trailer

There's an introductory video, but basically:

• Passive: Koumei rolls 5d6 on every ability. If she gets three sixes, the ability powers up. One of her weapons also gets status procs, with the enchantment jumping weapon to weapon.
• 1: Koumei spreads some string around, dealing a random status at some interval to enemies touching strings. Three sixes means the strings inflict every status.
• 2: Koumei gets a challenge with a curse attached. Once she does the challenge, she gets a Duviri decree. Stacks infinitely, but they said they might change it. Triple sixes skips the challenge and awards the decree immediately.
• 3: (Helminth). Koumei gets some charms that randomly turn incoming damage into healing. Three sixes gives her complete invulnerability for the duration.
• 4: Stacks status and CCs enemies in a cone. Three sixes maxes out the status stacks and turns it into a radial ability.

Vid: https://www.youtube.com/watch?v=ZZIftZwjGNI